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Help....Engine overheating alarm sounding
#11040973
08/14/15 03:00 AM
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Joined: Nov 2013
Posts: 570
Kelleys Lake Fork Cottage B&B
OP
Pro Angler
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OP
Pro Angler
Joined: Nov 2013
Posts: 570 |
..need to pick your brain. Merc 250 xb Engine over heating, no water coming out. Pulled the lower unit, impeller in tact. Doesn't look that bad, but going to replace it and thermostats since I have it apart. It's not discharging any water at all, idle or revved. Warning buzzer comes on in about 5 mins
Any ideas if it's not the impeller? Thermostats look v Good. Haven't put them in hot water yet though.. But figured I would replace them anyway
Ran it two weeks ago and no issues... Today, alarm sounded unloading it.... Thoughts?????
Mike
Last edited by Grasshoppah; 08/14/15 04:04 AM.
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Re: Engine overheating alarm sounding
[Re: Kelleys Lake Fork Cottage B&B]
#11041003
08/14/15 03:12 AM
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Joined: Dec 2007
Posts: 2,319
Matt M
Extreme Angler
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Extreme Angler
Joined: Dec 2007
Posts: 2,319 |
What motor? If it's a optimax a clogged discharge tube will cause a compressor overheat and give you the same alarm
Matts Marine Service 903-450-3539
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Re: Engine overheating alarm sounding
[Re: Kelleys Lake Fork Cottage B&B]
#11042723
08/15/15 12:51 AM
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Joined: Sep 2008
Posts: 120,580
hopalong
Pescador Loco
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Pescador Loco
Joined: Sep 2008
Posts: 120,580 |
mud daubers, pull the thermostat covers and use a hose to flush, see if water is circulating.
that is all I got.
" Hop, set the hook"! hopalong 99,999 TexDawg 99,999 FJB! not my president by a long shot!
lake fork FISHERMANS COVE MARINA/reservations - 903 474 7479
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Re: Engine overheating alarm sounding
[Re: Kelleys Lake Fork Cottage B&B]
#11042836
08/15/15 01:55 AM
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Joined: Mar 2010
Posts: 2,884
DKennimer
Extreme Angler
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Extreme Angler
Joined: Mar 2010
Posts: 2,884 |
Mike, I bet the thermostat got debris in them. If they haven't been replaced in awhile, I'd do it. You can put them in a saucepan with hot water to get them to open and get some tongs and move them back and fourth. Most of the time, you'll see wood chips. If you decide to reuse them after you clean them and you see them cycle at the right temp, check the rubber seal and replace gaskets (if not perfect). I replaced mine, just because, a year ago and I think they went to a different part number. I think it was a little higher operating temp... I can't remember 100%. I too have the XB. Contact Rockwall Marine or Don Weed on BBC for clarification and/or parts.
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Re: Engine overheating alarm sounding
[Re: Kelleys Lake Fork Cottage B&B]
#11042904
08/15/15 02:35 AM
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Joined: Nov 2013
Posts: 570
Kelleys Lake Fork Cottage B&B
OP
Pro Angler
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OP
Pro Angler
Joined: Nov 2013
Posts: 570 |
Thanks everyone... Ended up being a spun water impeller.... Impeller was replaced last year...
Thermostats were good.... Got the impeller changed and it shows good pressure and strong stream....
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Re: Engine overheating alarm sounding
[Re: Kelleys Lake Fork Cottage B&B]
#11042960
08/15/15 03:04 AM
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Joined: Dec 2007
Posts: 2,319
Matt M
Extreme Angler
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Extreme Angler
Joined: Dec 2007
Posts: 2,319 |
I have only seen that one other time
Matts Marine Service 903-450-3539
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